TBHQ – C10H14O2
Tert-butylhydroquinone.png

It is an antioxidant. It Is very effective in animal fats. Mostly used in frozen fish and other fish products. It is a precursor to stomach tumors and damage to DNA in some lab animals if given too much. It can also affect stomach’s in humans.

http://en.wikipedia.org/wiki/Image:Tert-butylhydroquinone.png
http://www.inchem.org/documents/jecfa/jecmono/v35je03.htm
Robert Glynn